<!-- Normal Textarea -->
<div class="form-group pmd-textfield">
  <label class="control-label">Text Area</label>
  <textarea required class="form-control"></textarea>
</div>

<!-- Floating Textarea -->
<div class="form-group pmd-textfield pmd-textfield-floating-label">
  <label class="control-label">Text Area</label>
  <textarea required class="form-control"></textarea>
</div>